Mazda Error Code P1120: How to Fix It

Q: Can I drive my Mazda with error code P1120?

You should avoid driving with P1120 as it can cause unpredictable acceleration, poor fuel economy, and potential safety hazards. The engine may go into limp mode, limiting your speed and power.

Q: How much does it cost to fix Mazda P1120 error code?

DIY repair typically costs $30-80 for a new TPS. Professional repair ranges from $150-300 including labor. The TPS itself is relatively inexpensive, but labor costs vary by location and complexity of access.

Q: What causes Mazda TPS sensor to fail?

Common causes include normal wear from repeated movement, contamination from oil or carbon buildup, electrical connector corrosion, damaged wiring, or exposure to extreme temperatures and engine vibration over time.

Q: How do I know if my Mazda TPS is bad?

Symptoms include rough idle, poor acceleration, engine hesitation, reduced fuel economy, check engine light, and the vehicle may enter limp mode with limited power and speed.

Q: Will P1120 code clear itself on Mazda?

The code will not clear itself while the underlying problem exists. Even if temporarily cleared, it will return quickly if the TPS is still malfunctioning. The issue must be repaired for permanent code clearing.

Abstract

Mazda error code P1120 indicates your Throttle Position Sensor (TPS) is reading values below the normal range, which can cause poor acceleration, rough idling, and reduced fuel economy. This sensor tells your engine's computer how much you're pressing the gas pedal, so when it malfunctions, your car's performance suffers significantly.